From 598a1d8dd7f621bb75a7f0537c5a63ee93e85a4c Mon Sep 17 00:00:00 2001
From: Adam Ierymenko <adam.ierymenko@gmail.com>
Date: Tue, 6 Oct 2015 18:10:40 -0700
Subject: Try reopening /dev/urandom if there is a problem.

---
 node/Utils.cpp | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

diff --git a/node/Utils.cpp b/node/Utils.cpp
index 3c6dee32..6c5d8c7d 100644
--- a/node/Utils.cpp
+++ b/node/Utils.cpp
@@ -181,7 +181,7 @@ void Utils::getSecureRandom(void *buf,unsigned int bytes)
 
 #ifdef __UNIX_LIKE__
 
-	static char randomBuf[65536];
+	static char randomBuf[131072];
 	static unsigned int randomPtr = sizeof(randomBuf);
 	static int devURandomFd = -1;
 	static Mutex globalLock;
@@ -199,10 +199,16 @@ void Utils::getSecureRandom(void *buf,unsigned int bytes)
 
 	for(unsigned int i=0;i<bytes;++i) {
 		if (randomPtr >= sizeof(randomBuf)) {
-			if ((int)::read(devURandomFd,randomBuf,sizeof(randomBuf)) != (int)sizeof(randomBuf)) {
-				fprintf(stderr,"FATAL ERROR: Utils::getSecureRandom() unable to read from /dev/urandom\n");
-				exit(1);
-				return;
+			for(;;) {
+				if ((int)::read(devURandomFd,randomBuf,sizeof(randomBuf)) != (int)sizeof(randomBuf)) {
+					::close(devURandomFd);
+					devURandomFd = ::open("/dev/urandom",O_RDONLY);
+					if (devURandomFd <= 0) {
+						fprintf(stderr,"FATAL ERROR: Utils::getSecureRandom() unable to open /dev/urandom\n");
+						exit(1);
+						return;
+					}
+				} else break;
 			}
 			randomPtr = 0;
 		}
-- 
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